Heterogeneous bridge deck continuous structure
By adopting a heterogeneous bridge deck continuous structure in the bridge deck continuous structure, and using technical means such as rubber plates and UHPC high-performance concrete, the problem of insufficient connection strength of the bridge deck continuous structure is solved, and the connection strength and service life of the bridge deck panel are improved .
Patent Information
- Application Number
- CN202420494269.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-13
AI Technical Summary
When the bridge deck continuous structure withstands negative bending moment, the connection strength is insufficient, resulting in uncoordinated deformation of the beam body and the bridge deck panels are prone to cracking, affecting service life.
The continuous structure of the heterogeneous bridge deck is adopted, and the ends of the concrete beam and the steel-concrete combination beam are connected through rubber plates, and the steel bars are connected with the simple-supported beam bridge deck paving steel bars. The continuous structural section of the bridge deck is poured with UHPC high-performance concrete.
The connection strength of concrete bridge decks at the continuous bridge deck is improved, the risk of concrete bridge decks is reduced, and the service life of the continuous bridge deck structure is extended.
Smart Images
Figure CN222455795U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge engineering, in particular to a continuous structure of a heterogeneous bridge deck. Background Art
[0002] The continuous structure of bridge deck is often used for multi-span simply supported beams with small and medium spans. In order to ensure driving comfort, the expansion device at the beam end is eliminated and the bridge deck is connected into a whole, avoiding adverse factors such as jumping, easy damage and frequent maintenance and repair caused by the expansion device. The continuous structure of bridge deck has good continuity and can greatly improve driving comfort. However, the bridge deck connection section is subject to a large negative bending moment. The deck is located in the tension zone. Affected by the slip effect between bridges, temperature, live load, etc., the connection strength is often insufficient, and the expansion and rotation of the beam body cause the deformation of the beam body to be uncoordinated. The bridge deck is prone to cracking at the continuous part of the bridge deck. Rainwater may leak around the shear members and cause the shear members to rust, thereby causing a decrease in structural stiffness and durability, which greatly affects the service life of the continuous structure of the bridge deck.
[0003] At present, in order to improve the stress condition of the continuous parts of the bridge deck and ensure the durability of the continuous structure of the bridge deck, the existing engineering practices are mainly: using improved continuous bridge deck filling materials, using high-strength span joint connectors, using complex limit devices between beam ends, etc. These methods cannot effectively improve the stress condition of the continuous structure of the bridge deck, and are complex to construct and maintain. Utility Model Content
[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned background technology and to provide a continuous structure of a heterogeneous bridge deck, which can enhance the continuous connection strength of the bridge deck and has a simple structure, is easy to construct and has high reliability.
[0005] The utility model provides a heterogeneous bridge deck continuous structure, comprising a pier and a support arranged on the top of the pier, wherein the support is respectively provided with a concrete beam and a steel-concrete composite beam arranged adjacent to each other, a reinforced concrete pavement layer and a bridge deck pavement steel mesh arranged in the reinforced concrete pavement layer are arranged on the top of the concrete beam and the steel-concrete composite beam, an end seam is arranged between the opposite ends of the concrete beam and the steel-concrete composite beam, the bridge deck pavement steel mesh spans the end seam, a rubber foam plate is arranged on the end seam, a rubber plate spanning the end seam is arranged on the top of the rubber foam plate, a continuous structural section concrete connecting plate and continuous structural section steel bars arranged in the continuous structural section concrete connecting plate and arranged along the length direction of the bridge deck are arranged on the top of the rubber plate, and the continuous structural section concrete connecting plate is connected to the reinforced concrete pavement layers at both ends thereof.
[0006] In the above technical solution, the continuous structural section steel bars have two layers, the first layer of continuous structural section steel bars are located on the top of the bridge deck pavement steel mesh, and the second layer of continuous structural section steel bars are located below the bridge deck pavement steel mesh.
[0007] In the above technical solution, the continuous structural segment steel bars are arranged in a staggered manner with the adjacent steel bars of the bridge deck pavement steel mesh arranged in the same direction.
[0008] In the above technical solution, the first layer of continuous structural segment steel bars and the corresponding second layer of continuous structural segment steel bars are located in the same vertical plane.
[0009] In the above technical solution, the end of the continuous structural section steel bar is longer than the corresponding end of the rubber plate by a certain distance, and the end of the continuous structural section concrete connecting plate is flush with the corresponding end of the continuous structural section steel bar.
[0010] In the above technical solution, a plurality of grooves are symmetrically provided on the top of the continuous structural section concrete connecting plate along the end seam hole dividing line, each of the grooves is arranged along the cross-sectional direction of the bridge deck, and a sealing paste strip is embedded in each of the grooves.
[0011] In the above technical solution, the continuous structural section concrete connecting plate and the reinforced concrete pavement layer are a cast-in-place structure, and the top surface of the continuous structural section concrete connecting plate is flush with the top surface of the reinforced concrete pavement layer.
[0012] In the above technical solution, the continuous structural section concrete connecting plate and the top of the reinforced concrete pavement layers at both ends thereof are respectively provided with a waterproof layer.
[0013] In the above technical solution, an asphalt surface layer is provided on the top surface of the waterproof layer.
[0014] The utility model of heterogeneous bridge deck continuous structure has the following beneficial effects:
[0015] The utility model provides a heterogeneous bridge deck continuous structure, which connects the concrete beam and the steel-concrete composite beam end cross beam top plate by rubber plates, connects with the simply supported beam bridge deck paving steel bars on both sides by steel bars, and adopts UHPC high-performance concrete to cast the bridge deck continuous structural section. The technical solution improves the connection strength of the concrete bridge deck at the continuous part of the bridge deck, and makes the tensile stress generated by the negative bending moment at the continuous part of the bridge deck be borne in sequence by the rubber foam plate, the rubber plate, the continuous structural section steel bars, the bridge deck paving steel mesh, and the UHPC high-performance concrete, giving full play to the advantages of the structure and material performance, thereby reducing the risk of cracking of the concrete bridge deck.
[0016] The utility model provides a heterogeneous bridge deck continuous structure, which connects the bridge decks on both sides into a force-bearing whole through continuous structural measures. It has a simple structure, convenient construction, low cost, and can ensure the continuous connection quality of the bridge deck, and has good technical and economic advantages. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1It is a schematic diagram of the overall structural longitudinal section of the heterogeneous bridge deck continuous structure of the utility model;
[0018] Figure 2 It is a cross-sectional schematic diagram of a continuous structure of a heterogeneous bridge deck of the utility model;
[0019] Figure 3 It is a plan view of the positional relationship between the bridge deck paving steel mesh and the continuous structural section steel bars in the heterogeneous bridge deck continuous structure of the utility model;
[0020] Figure 4 for Figure 1 A magnified schematic diagram of center A. DETAILED DESCRIPTION
[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but the embodiments should not be construed as limiting the present invention.
[0022] like Figure 1 The heterogeneous bridge deck continuous structure shown includes a bridge pier 1, a support 2, a concrete beam 3, a steel-concrete composite beam 4, a rubber foam board 5, a rubber board 6, a sealing paste strip 7, a bridge deck paving steel mesh 8, a continuous structural section steel bar 9, a continuous structural section concrete connecting plate 10, a reinforced concrete paving layer 11, a waterproof layer 12, and an asphalt surface layer 13; the support 2 is arranged on the top of the bridge pier 1. After the ends of the concrete beam 3 and the steel-concrete composite beam 4 are erected, the end seams of the bridge deck continuous structure are filled with a rubber foam board 5, and a rubber board 6 is pasted thereon. The continuous structural section concrete connecting plate 10 is provided with a waterproof layer 12, and an asphalt surface layer 13 is provided above the waterproof layer 12.
[0023] like Figure 2 The continuous structural reinforcement of the bridge deck shown includes a bridge deck paving reinforcement mesh 8 and continuous structural segment reinforcement 9. The continuous structural segment reinforcement 9 is respectively located on the upper and lower layers of the bridge deck paving reinforcement mesh 8 and is staggered. When the bridge is oblique, the continuous structural segment reinforcement 9 is still arranged along the bridge direction.
[0024] like Figure 3 The length of the continuous structural section steel bar 9 arranged along the axial direction of the bridge deck is 2200 mm, centered along the end seam perforation line 14, and arranged along the bridge direction.
[0025] like Figure 4 The bridge deck continuous structure including the continuous structure segment concrete connecting plate 10 shown has continuous structure segment steel bars 9 , bridge deck paving steel mesh 8 , sealing paste 7 , and continuous structure concrete connecting plate 10 .
[0026] Preferably, the rubber foam sheet 5 has a density of 75-80 kg / m 3, elongation at break ≥ 200%, tensile strength ≥ 0.65MPa, with flame retardant and anti-oxidation properties. After the concrete beam 3 and the steel-concrete composite beam 4 are erected, the end seam garbage is cleaned and fully embedded.
[0027] Preferably, the rubber sheet 6 is 1000 mm long and is made of 2 mm chloroprene rubber sheet, which is arranged centrally along the end seam hole line 14 on the top surface of the concrete beam 3 and the steel-concrete composite beam 4, and is leveled with M10 cement mortar, and then the rubber sheet 6 is adhered to the top plate of the concrete beam 3 and the steel-concrete composite beam 4 with resin glue. The rubber sheet 6 has excellent weathering resistance, ozone resistance, aging resistance, and good mechanical properties.
[0028] Preferably, the continuous structural section steel bars 9 and the bridge deck pavement steel mesh 8 are made of HRB400 grade steel bars, and the distance between the continuous structural section steel bars 9 and the continuous structural section concrete connecting plate 10 and the top surface net protective layer of the reinforced concrete pavement layer 11 is 20 mm, and they are connected by binding.
[0029] Preferably, the continuous structural section concrete connecting plate 10 is made of UHPC high-performance concrete material, and the continuous structural range is 1.1m on both sides of the end seam hole line 14 of the pier 1, with a total width of 2.2m and a thickness of 80mm. UHPC ultra-high performance concrete has a compressive strength of >140MPa, a tensile strength of >8MPa, an elastic modulus of >40GPa, and an apparent density of 2400-2550kg / m 3 The continuous structural section concrete connecting plate 10 is cast in situ together with the reinforced concrete pavement layer 11 .
[0030] Preferably, the top of the continuous structural section concrete connecting plate 10 is symmetrically grooved at 500 mm on both sides of the end seam hole line 14 , the groove size is 5 mm*10 mm, and is filled with a sealing paste strip 7 .
[0031] Preferably, the sealing paste strip 7 is made of polyurethane waterproof sealing paste for roads and bridges, which has excellent wear resistance, low-temperature flexibility, good adhesion, good elasticity, and recoverability.
[0032] Preferably, the reinforced concrete pavement layer 11 is 80 mm thick and is made of C50 concrete.
[0033] Preferably, a waterproof layer 12 is provided above the reinforced concrete pavement layer 11, using a PB (II) type polymer modified asphalt waterproof coating, and a carcass reinforcement material is provided in the coating.
[0034] Preferably, an asphalt surface layer 13 is provided above the waterproof layer 12, and the thickness is 100 mm.
[0035] The continuous structural section concrete connecting plate 10 described in this embodiment adopts UHPC high-performance concrete, which is an ultra-high-strength cement-based material with high strength, high toughness and low porosity. Based on the good tensile, bending and cracking resistance of UHPC, it is not easy to crack under the effects of temperature changes, shrinkage creep, live loads, etc. at the continuous structure of the bridge deck, and its low porosity and density make it more durable and serviceable when applied to the bridge span joint.
[0036] The construction sequence of a heterogeneous bridge deck continuous structure described in this embodiment is generally to erect concrete beams 3 and steel-concrete composite beams 4, fully embed rubber foam panels 5 in end seams, adhere rubber panels 6 to the top plates of the continuous structural section concrete beams 3 and the steel-concrete composite beams 4, lay out the bridge deck paving steel mesh 8 and pour the reinforced concrete paving layer 11 of the bridge deck, arrange the continuous structural section steel bars 9 at the continuous structure of the bridge deck, pour the continuous structural section concrete connecting plate 10, cut grooves and pour sealing paste to form sealing paste strips 7, lay a waterproof layer 12, and lay an asphalt surface layer 13.
[0037] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
[0038] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.
Claims
1. A continuous bridge deck structure of a heterogeneous bridge, comprising a bridge pier (1) and a support (2) arranged on the top of the bridge pier (1), wherein the support (2) is respectively provided with adjacently arranged concrete beams (3) and steel-concrete composite beams (4), the tops of the concrete beams (3) and the steel-concrete composite beams (4) are provided with reinforced concrete pavement layers (11) and bridge deck pavement steel meshes (8) arranged in the reinforced concrete pavement layers (11), end seams are provided between the opposite ends of the concrete beams (3) and the steel-concrete composite beams (4), and the bridge deck pavement steel meshes (8) span the end seams, characterized in that: The end seam is provided with a rubber foam plate (5), the top of the rubber foam plate (5) is provided with a rubber plate (6) spanning the end seam, the top of the rubber plate (6) is provided with a continuous structural section concrete connecting plate (10) and continuous structural section steel bars (9) arranged in the continuous structural section concrete connecting plate (10) and arranged along the length direction of the bridge deck, and the continuous structural section concrete connecting plate (10) is connected to the reinforced concrete pavement layers (11) at both ends thereof.
2. The heterogeneous bridge deck continuous structure according to claim 1 is characterized by: The continuous structural section steel bars (9) have two layers, the first layer of continuous structural section steel bars (9) is located on the top of the bridge deck pavement steel mesh (8), and the second layer of continuous structural section steel bars (9) is located below the bridge deck pavement steel mesh (8).
3. The heterogeneous bridge deck continuous structure according to claim 2 is characterized by: The continuous structural segment steel bars (9) are arranged in a staggered manner with the steel bars of the adjacent bridge deck pavement steel mesh (8) arranged in the same direction.
4. The heterogeneous bridge deck continuous structure according to claim 3 is characterized by: The first layer of continuous structural section steel bars (9) and the corresponding second layer of continuous structural section steel bars (9) are located in the same vertical plane.
5. The heterogeneous bridge deck continuous structure according to claim 4 is characterized by: The end of the continuous structural section steel bar (9) is longer than the corresponding end of the rubber plate (6) by a certain distance, and the end of the continuous structural section concrete connecting plate (10) is flush with the corresponding end of the continuous structural section steel bar (9).
6. The heterogeneous bridge deck continuous structure according to claim 5 is characterized by: The top of the continuous structural section concrete connecting plate (10) is symmetrically provided with a plurality of grooves along the end seam dividing hole line (14), each of the grooves being arranged along the cross-sectional direction of the bridge deck, and a sealing paste strip (7) being embedded in each of the grooves.
7. The heterogeneous bridge deck continuous structure according to claim 6 is characterized by: The continuous structural section concrete connecting plate (10) and the reinforced concrete pavement layer (11) are a cast-in-place structure, and the top surface of the continuous structural section concrete connecting plate (10) is flush with the top surface of the reinforced concrete pavement layer (11).
8. The heterogeneous bridge deck continuous structure according to claim 7 is characterized by: The continuous structural section concrete connecting plate (10) and the tops of the reinforced concrete pavement layers (11) at both ends thereof are respectively provided with waterproof layers (12).
9. The heterogeneous bridge deck continuous structure according to claim 8, characterized in that: The top surface of the waterproof layer (12) is provided with an asphalt surface layer (13).